Manufacture of shoes



Seiat. 7, 1937. c. c. HYDE' ,533

MANUFACTURE OF SHOES Fild Aug. 11. 1934 2 Sheets-Sheet l I .Sept. 7,1937. c. c. HYDE 2,092,533 A v MANUFACTURHOF SHOES.

Fiied Aug. 11. 1934 2 Sheets-Shet 2 ll/P31111111 //v VfN 70/1.

Patented Sept. 7, I937 UNITED STATES 2,092,533 MANUFACTURE OF snoEsClifton C. Hyde, Marlborough, Mass., assignor to United Shoe MachineryCorporation, Paterson, N. J'., a corporation of New Jersey ApplicationAugust 11, 1934, Serial No. 739,366

4 Claims.

This-invention relates to improvements in the manufacture of cross-strapsandals and other shoes of the type wherein the sole is adapted to beretained in place upon the foot by means of straps or the like extendingfrom one lateral edge portion of thesole to the other.

A sandal or shoe 'of' this type as constructed at the present timeusually comprises an insole, an

outsole, and a plurality of cross-straps the opposite ends of whichextend between the soles and are permanently attached to one or both ofthem. In such a. shoe the cross-straps tend to form humps or ridges inthe insole at the points where their attached ends underlie the insole.Such humps or ridges are unsightly and are liable to cause discomfort tothe wearer of the shoe.

In view of the foregoing, it is one object of the present invention toinsure against the formation of any such undesirable humps or ridges inthe bottoms of cross-strap sandals or similar shoes.

To the accomplishment of this object the invention, as hereinillustrated, provides an improved strap sandal comprising an outsole, atwo-layer .1

when the latter are received in the notches their outer surfaces will besubstantially flush with the adjacent outer surface of the insole. Theends of the straps being thus countersunk in the insole, they will nothold the insole and outsole apart where they extend between them andthey will have no tendency to form humps or ridges in the insole.

As illustrated, the ends (if the cross-straps are secured to theportions of the insole which define the bottoms of the recesses (i. e.,to the inner 4.5 layer in the laminated insole herein shown) by means ofsuitable fastenings such as staples, the

straps being assembled with the insole and the staple fastenings beinginserted with the parts either on or off the last as may be desired. Thestraps may be secured to the insole, however, by means of cement or bymeans of both cement and staple fastenings.

' It is to be recognized that invention resides also in an insoleembodying the various novel 55 features of construction herein referredto.

to the accompanying drawings, in which Fig. 1 is a perspective view ofthe outer or lower I layer of a two-ply insole employed in themanufacture of my improved cross-strap sandal;

Fig. 2 is a perspective view of the inner or upper layer of the two-plyinsole; I

Fig. 3 is a perspective view of a completed twoply insole ready forassembly with the other parts of a cross-strap sandal, the view showingthe outer or lower side thereof;

Fig. 4 is a perspective view of-the sandal as it appears before theoutsole has been attached;

Fig. 5 is a perspective view of the completed sandal; and

Figs. 6 and '7 are sectional views taken, respectively, along the linesVI-VI and VIIVII of Fig. 5.

The cross-strap sandal illustrated in the drawings comprises an insoleI0, an outsole l2, a. heel M (Fig. 5), and a plurality of crossstraps I6which are arranged to encircle different portions of the foot and theopposite end portions of which extend betweenthe insole and the outsoleand are firmly secured by means of staple fastenings IB (Fig. 4) to theinsole [0. In order to insure against the formation of any undesirablehumps or ridges in the insole in those locations where the cross-strapsunderlie the insole, the outer or outsole-engaging side of the insolehas formed therein a series of shallow marginal recesses (Fig. 3) forreceiving the end portions of the straps. As shown, the recesses 20 donot extend through the full thickness of the insole but are made onlydeep enough to accommodate the thickness of the straps and to allow asubstantial thickness of insole material at the bottoms of the recessesto receive the legs of the staple fastenings l8 so that the latter willserve firmly to anchor the straps to the insole. Each recess 20 extendsinwardly from the edge of the sole a substantial distance to enable twoor more lines of staples to be inserted if desired and to, provide amplearea for adhesive attachment of the straps to the insole as anadditional means for securing the straps in place.

To facilitate the manufacture of shoes of this type in quantity withoutthe use of expensive machinery for forming the recesses in the insoles,it is preferred to employ an insole of laminated construction comprisinga full length outer or lower layer 22 .(Fig. 1) and a full length inneror upper layer 24 (Fig. 2), the inner layer 24 having a normal edgecontour and the outer layer 22 having formed therein a series ofmarginal rectangular notches 26 and having its edge portions betweensaid notches of the same contour as corresponding portions of the innerlayer 24.

Advantageously the notches 26 in the outer layer 22 may be cut by meansof a die which may be shaped to determine also the outline of theunnotched portions of the layer 22. After being died out the two layers22 and 24 are superposed with the edge portions of the outer layer 22which are located between the notches 26 alined with the edge of theinner layer 24 so that the notched portions of the layer 22 cooperatewith the ad- Jacent portions of the unnotched layer 24 to provide thestrap-receiving recesses 20. The layers 22 and 24 are permanentlysecured together in any suitable manner, for example by staple fastenersor by cement or, as herein illustrated by means of staple fasteners 28and cement, the cement being indicated at 29in Fig. I. As shown, theedge of the two-ply insole thus produced is bound by a strip of tape 30which is secured by stitches 32 to the inner surface of the inner layer24 and to the outer surface of the outer layer 22 in the marginalportions of the insole between the notches 26 and. secured to the innerand outer surfacesof the inner layer 24 in those portions of the insolewhere the notches 26' or recesses 20 .are located. It will be noted thatthe portions of the tape 30 which overlie the recessed portions of theinsole are held in intimate contact with the outer surface of the innerlayer 24 so as not to interfere with the countersinking of the crossstraps into the insole.

In making the cross-strap sandal herein illustrated the insole l0 andthe straps l6 may be assembled either on or off a last, the opposite endportions of the straps being positioned within the recess 20 with theirextremities abutting the shoulders 34 formed at the bottoms of thenotches 26 in the insole layer 22 and being firmly and permanentlysecured to the insole layer 24 by means of the staple fastenings l8, orby means of pyroxylin or other suitable cement, or, as illustrated, bymeans of both staple fastenings l8 and cement, the cement beingindicated at 35 in Fig. 6. The straps l6 herein illustrated are formedby braiding strips of fabric or the like and 'it is to be noted that theuse of staple fastenings for attaching such straps is particularlyadvanta-- geous inasmuch as the staple fastenings secure the ends of thestraps so as effectively to prevent any raveling of the braided strips.

The staple fastenings l8 may advantageously be inserted by means of astaple fastening machine such, for example, as that disclosed in UnitedStates Letters Patent No. 1,016,930, granted February 13, 1912, upon anapplication of W. H. Borden. If the parts being secured together havebeen previously assembled upon a last, the bottom of the last willpreferably be faced with metal for clenching the legs of the staples,the metal facing having suitable apertures through which tacks may bedriven into the wood of the last for temporarily securing the insole tothe last. last the staple fastening machine may advantageously beprovided with a staple clenching anvil carried by a suitably curvedwork-supporting arm or horn, such as that disclosed in United StatesLetters Patent No. 1,852,152, granted April 5, 1932, upon an applicationof L. G. Dingeldey. The staple fastening machine above referred towithout the anvil and work-supporting horn may also be used forinserting the staples 28 for securing together the insole layers 22 and24. If the If the parts are to be assembled off the 39, any suitablecement sole attaching press being employed for this purpose. Inasmuch asthe end portions of the straps l6 are received within the recesses 20 inthe insole so that their outer surfaces are substantially flush with theouter surface of the insole, they will have no tendency to hold'theoutsole away from the in- 1 sole and will not interfere with theobtaining of a satisfactory bond between the soles. Moreover, the cementused'in attaching the outsole will cause the outsole and'the inturnedend portions of the straps I6 to become firmly cemented together so thatthe straps will become even more firmly anchored in place after theoutsole has been secured to the shoe.

As shown, the heel I4 is secured to the shoe by means of nails 40 (Fig.5) which are driven from the inside of the shoe and extend through boththe insole and the outsole and preferably, also, through a reinforcingheel piece 42 which is applied to the inner surface of the insole. Asock lining 44 having a pinked edge 46 is adhesively secured to theinner side of the insole, the sock lining covering the heel reinforcingpiece 42 and overlying the upper surfaces of the binding 30 of theinsole so as to conceal the stitches which attach the binding tape 30.

Having described the invention, what I claim as new and desire to secureby Letters Patent of the United States is:

1. A cross-strap sandal comprising an inner insole member having anormal edge contour, an outer insole member having formed therein aseries of marginal strap-receiving notches and having its edge portionsbetween said notches of the same contour as corresponding portions ofsaid inner insole member and said outer insole member being permanentlysecured to said inner member with the edge portions of said outer memberbetween said notches alined with the edge of said inner member, an edgebinding s'ecured to the inner surface of said inner member and the outersurface of said outer member in the marginal portions of said memberbetween said notches and secured to the inner and outer surfaces of saidinner member in the portions adjacent to the notches in said outermember, a plurality of cross-strap members having in turned end portionsreceived within said notches and secured to said inner insole member,and an outsole secured to said outer insole member and to said inturnedportions of said straps.

2. A laminated insole for a cross-strap sandal comprising an inner layerhaving a normal edge contour, an outer layer having formed therein aseries of marginal strap-receiving notches and having its edge portionsbetween said notches of the same contour as the corresponding portionsof said inner layer and said outer layer being permanently secured tosaid inner layer with the edge portions of the outer layer between thenotches alined with the edge of said inner layer, and an edge bindingsecured to the inner surface of said inner layer and the outer surfaceof said outer layer in the marginal portions of the insole between saidnotches and secured to the inner and outer surfaces of said inner layerin the portions of the insole where said notches are located.

- 3. A laminated insole for a cross-strap sandal comprising an innerlayer having a normal edge contour, and an outerilayer secured to theinner layer and having its opposite lateral edges notched to receiveopposite end portions of a cross-strap in overlying relation to saidinner layer, and an edge binding overlapping the outer surface of saidouter layer and the inner surface of said inner layer, said bindingintimately engaging also the outer surface of said inner layer where thelatter is exposed by the notches in said outer layer.

4. A strap sandal comprising an inner insole layer having an outlinecorresponding to that of a normal insole, an outer insole layerpermanently secured to said inner layer and having an outlinecorresponding to that of said inner layer except for a plurality ofstrap-receiving notches formed in the opposite lateral edges of saidouter layer, a continuous edge binding strip overlapping the innersurface of said inner layer and the outer surface of the unnotchedportions of said outer layer and extending across the notches in saidouter layer, said binding strip intimately engaging also the outersurface of said inner layer in localities opposite said notches, anoutsole secured to said outer insole layer, and crossstraps having theirend portions received in said notches and fixedly secured to saidoutsole and to said inner insole layer in overlying relation to saidedge binding so as permanently to be retained within said notches.

